GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/tcpdump/print-rip.c Lines: 0 87 0.0 %
Date: 2017-11-13 Branches: 0 49 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: print-rip.c,v 1.16 2015/11/16 00:16:39 mmcc Exp $	*/
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/*
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 * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1996
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that: (1) source code distributions
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 * retain the above copyright notice and this paragraph in its entirety, (2)
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 * distributions including binary code include the above copyright notice and
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 * this paragraph in its entirety in the documentation or other materials
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 * provided with the distribution, and (3) all advertising materials mentioning
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 * features or use of this software display the following acknowledgement:
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 * ``This product includes software developed by the University of California,
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 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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 * the University nor the names of its contributors may be used to endorse
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 * or promote products derived from this software without specific prior
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 * written permission.
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 */
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"			/* must come after interface.h */
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struct rip {
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	u_char rip_cmd;			/* request/response */
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	u_char rip_vers;		/* protocol version # */
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	u_short rip_zero2;		/* unused */
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};
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#define	RIPCMD_REQUEST		1	/* want info */
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#define	RIPCMD_RESPONSE		2	/* responding to request */
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#define	RIPCMD_TRACEON		3	/* turn tracing on */
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#define	RIPCMD_TRACEOFF		4	/* turn it off */
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#define	RIPCMD_POLL		5	/* want info from everybody */
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#define	RIPCMD_POLLENTRY	6	/* poll for entry */
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#define RIP_AUTHLEN 16
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struct rip_netinfo {
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	u_short rip_family;
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	u_short rip_tag;
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	u_int32_t rip_dest;
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	u_int32_t rip_dest_mask;
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	u_int32_t rip_router;
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	u_int32_t rip_metric;		/* cost of route */
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};
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static void
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rip_printblk(const u_char *cp, const u_char *ep)
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{
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	for (; cp < ep; cp += 2)
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		printf(" %04x", EXTRACT_16BITS(cp));
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	return;
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}
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static void
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rip_entry_print_v1(int vers, const struct rip_netinfo *ni)
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{
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	u_short family;
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	/* RFC 1058 */
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	family = EXTRACT_16BITS(&ni->rip_family);
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	if (family != AF_INET) {
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		printf(" [family %d:", family);
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		rip_printblk((u_char *)&ni->rip_tag,
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			     (u_char *)&ni->rip_metric +
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			     sizeof(ni->rip_metric));
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		printf("]");
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		return;
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	}
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	if (ni->rip_tag || ni->rip_dest_mask || ni->rip_router) {
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		/* MBZ fields not zero */
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		printf(" [");
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		rip_printblk((u_char *)&ni->rip_family,
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			     (u_char *)&ni->rip_metric +
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			     sizeof(ni->rip_metric));
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		printf("]");
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		return;
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	}
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	printf(" {%s}(%d)", ipaddr_string(&ni->rip_dest),
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	       EXTRACT_32BITS(&ni->rip_metric));
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}
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static void
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rip_entry_print_v2(int vers, const struct rip_netinfo *ni)
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{
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	u_char *p;
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	u_short family;
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	char buf[RIP_AUTHLEN];
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	/* RFC 1723 */
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	family = EXTRACT_16BITS(&ni->rip_family);
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	if (family == 0xFFFF) {
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		if (EXTRACT_16BITS(&ni->rip_tag) == 2) {
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			memcpy(buf, &ni->rip_dest, sizeof(buf));
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			buf[sizeof(buf)-1] = '\0';
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			for (p = buf; *p; p++) {
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				if (!isprint(*p))
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					break;
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			}
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			if (!*p) {
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				printf(" [password %s]", buf);
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			} else {
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				printf(" [password: ");
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				rip_printblk((u_char *)&ni->rip_dest,
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					     (u_char *)&ni->rip_metric +
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					     sizeof(ni->rip_metric));
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				printf("]");
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			}
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		} else {
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			printf(" [auth %d:",
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			       EXTRACT_16BITS(&ni->rip_tag));
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			rip_printblk((u_char *)&ni->rip_dest,
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				     (u_char *)&ni->rip_metric +
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				     sizeof(ni->rip_metric));
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			printf("]");
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		}
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	} else if (family != AF_INET) {
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		printf(" [family %d:", family);
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		rip_printblk((u_char *)&ni->rip_tag,
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			     (u_char *)&ni->rip_metric +
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			     sizeof(ni->rip_metric));
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		printf("]");
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		return;
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	} else { /* AF_INET */
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		printf(" {%s", ipaddr_string(&ni->rip_dest));
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		if (ni->rip_dest_mask)
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			printf("/%s", ipaddr_string(&ni->rip_dest_mask));
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		if (ni->rip_router)
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			printf("->%s", ipaddr_string(&ni->rip_router));
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		if (ni->rip_tag)
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			printf(" tag %04x", EXTRACT_16BITS(&ni->rip_tag));
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		printf("}(%d)", EXTRACT_32BITS(&ni->rip_metric));
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	}
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}
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void
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rip_print(const u_char *dat, u_int length)
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{
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	const struct rip *rp;
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	const struct rip_netinfo *ni;
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	int i, j, trunc;
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	i = min(length, snapend - dat) - sizeof(*rp);
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	if (i < 0) {
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		printf(" [|rip]");
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		return;
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	}
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	rp = (struct rip *)dat;
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	switch (rp->rip_vers) {
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	case 0:
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		/* RFC 1058 */
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		printf(" RIPv0: ");
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		rip_printblk((u_char *)(rp + 1), snapend);
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		break;
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	default:
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		switch (rp->rip_cmd) {
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		case RIPCMD_REQUEST:
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			printf(" RIPv%d-req %d", rp->rip_vers, length);
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			break;
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		case RIPCMD_RESPONSE:
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			j = length / sizeof(*ni);
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			if (j * sizeof(*ni) != length - 4)
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				printf(" RIPv%d-resp [items %d] [%d]:",
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				       rp->rip_vers, j, length);
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			else
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				printf(" RIPv%d-resp [items %d]:",
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				       rp->rip_vers, j);
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			trunc = (i / sizeof(*ni)) != j;
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			ni = (struct rip_netinfo *)(rp + 1);
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			for (; (i -= sizeof(*ni)) >= 0; ++ni) {
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				if (rp->rip_vers == 1)
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					rip_entry_print_v1(rp->rip_vers, ni);
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				else
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					rip_entry_print_v2(rp->rip_vers, ni);
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			}
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			if (trunc)
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				printf("[|rip]");
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			break;
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		case RIPCMD_TRACEON:
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			printf(" RIPv%d-traceon %d: \"", rp->rip_vers, length);
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			(void)fn_print((const u_char *)(rp + 1), snapend);
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			fputs("\"", stdout);
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			break;
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		case RIPCMD_TRACEOFF:
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			printf(" RIPv%d-traceoff %d", rp->rip_vers, length);
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			break;
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		case RIPCMD_POLL:
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			printf(" RIPv%d-poll %d", rp->rip_vers, length);
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			break;
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		case RIPCMD_POLLENTRY:
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			printf(" RIPv%d-pollentry %d", rp->rip_vers, length);
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			break;
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		default:
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			printf(" RIPv%d-#%d %d", rp->rip_vers, rp->rip_cmd,
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			       length);
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			break;
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		}
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        }
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}